# Add era data for iso8601 calendar.
#
# ICU bug: https://unicode-org.atlassian.net/browse/ICU-23262

diff --git a/intl/icu/source/data/misc/supplementalData.txt b/intl/icu/source/data/misc/supplementalData.txt
--- a/intl/icu/source/data/misc/supplementalData.txt
+++ b/intl/icu/source/data/misc/supplementalData.txt
@@ -213,16 +213,35 @@ supplementalData:table(nofallback){
                         622,
                         7,
                         18,
                     }
                 }
             }
             system{"lunar"}
         }
+        iso8601{
+            eras{
+                0{
+                    end:intvector{
+                        0,
+                        12,
+                        31,
+                    }
+                }
+                1{
+                    start:intvector{
+                        1,
+                        1,
+                        1,
+                    }
+                }
+            }
+            system{"solar"}
+        }
         japanese{
             eras{
                 0{
                     start:intvector{
                         645,
                         6,
                         19,
                     }